Circuit Lake

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This is simple but very powerful USB charger project for your gadget like mp3 player, camera, cell phone, and any other gadget you can plug into a USB port to charge. Main component of the project is LT1302, Micropower High Output Current Step-Up Adjustable and Fixed 5V DC/DC Converters from Linear.

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The project will shows you how to build an electronic batterless dice. As the tube is shaken, the magnets traverse the length of the tube back and forth, thus changing the magnetic flux through the coil and the coil therefore produces an AC voltage.
The muscle powered voltage generator is based on Faraday’s law, consisting [...]

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This schematic shows you how to build power inverter 12-V battery to 220 V. You can use it for mobile inverter power supply whether in the car, boat, caravan or motor home. When it comes to grid independent operation of simple electrical appliances, such as lamps, soldering irons and small electric tools is a [...]

If you need a power supply that can deliver high currents, try to make it from old ATX PSU. You just need a little modification in front panel like what Peter Sandström did. Here few example uses of this power supply: power source for a 12V car amp, cheap alternative for replacing your broken WLAN [...]

This is a Surround Processor Project with the digital delay method created by Chan. This audio processor only uses general purpose ICs that easy to find. The type of this Surround Processor is generating the surround effect with processing two channels of stereo source. Most of those are generates the surround effect with separates reverberations [...]

The Super Ear is an ultra high gain stereo audio amplifier! And when we say high gain, we mean it! It boosts audio 50 times and you can listen to it in stereo besides! Miniature high sensitivity microphones are placed at 45 degree angles to give you maximum separation. This little kit also includes an [...]

This circuit is for detecting any audio signal with justable noise offset. It could be used to generate a radio mute signal eg. from a PDA.
The circuit is consisting of: